X-ray apparatus and supply cable for same



Jan.'1, 1935. A, Bouwr-:Rs 1,986,497

X-RAY APARATUS AND SUPPLY CABLE FOR SAME Filed April e, 1931 y /M/f/vro LBERT bouwt/e5 f vI 'myfcopendingfap licationffSerialkNo. 257,@r

" supplied' wf e i more'fpassge providedWithin` afcurrent supply Pplicati Netherlands@- he present L invention hasl for its objectto irziprv'e* such if ani:L installation? f and f yit concerns such-#Ta constructie ifo the devices Afconnecting une.natie plftne `me' that-'emma operation the cezilirigi1medium?f` reniainsf" electrostatic `11 "unmediimovving-through the cable. Especially inthe cooling medium consists of `a liquid; an

1electrostatic: load may give rise to unfavourable phenomenaJ such` as the formation of vapour and gas, due to which the reliability lof service of the cable and the connecting devices decreases.

- charge conduits but in this construction the Besides, a concentric supply and discharge ofthe i e cooling medium gives a favourable distribution of the electric eld in the dielectric of the cable f and, in addition, vgives a suitable solution of theproblem of making the connection with the body to be cooled. i

In my above-mentioned prior application` there is described a mode of construction with concentric arrangement of the supply and discooling medium `flovvs back through a space sur- `rounding the current conductor due to which `in the cooling medium is set up an electriclfleld Vwith all the disadvantages thereof.

The invention will be `more clearly understood f by referring to the accompanying `drawing in `ner in which the connection tube may be effected. 55

which Fig. 1 represents schematically the c onnection of an X-ray tube With a cooling liquid pump. t

Figure 2 shows byway 'of example the manof` the cable to they p Referring to Fig. `1, a grounded envelope 1.

.to N` IV.' Philips, Gloeilainpenfabr Netherlands', asslgn 1i, i F

14. ferne.Qendffofathefubbefituber remmen-fis slid on the nipple is located in the "annular space between thernipple 20 and the part 15 which is urged by resiliency to the outside. Said part engages `a contact sleeve 21 to which the con- .ductor 19 ofthe cable is secured. Thecontact sleeve 2 1 is secured to a connecting piece 22 of insulating material which is slid on the end-of the cable 17 and which is preferably cemented thereto with the aid of a binder,

. such as she1lac,\slo that there is no air between the cable and the conductor 19 protruding therefrom andthe connecting piece 22.

The cable 17 is enclosed by ajmetal sheath 24, is electrically connected with the `aid of a' `coupling nut 25to the metal envelope 26 which entirely surrounds the tube 10,. The connecting piece 22 i'ltsinto a cavityof ablock 27 of `insulating material in which the contact .piece 14 is fixed. `This block closes the end of an insulating cylinder 28 within which the X-ray tube is located.

'Ihe rubber tube 18 is slid on a nipple at the` end of the" pipe 13, which is held in its proper place by means of a perforated disc 29. The electric current supplied by the conductor 19, ows via 21, 14 and 12 to the anode of the .Which, through `the intermediary of rings 23 and I having internal portions to be cooled by'circulating liquid introduced from the exterior, a

flexible hose for the supply of cooling liquid and a second exible hose for conductinggtheiliquid away from the tube, one of said hoses -being 1o'` cated within the other, a high-tension electrical cable having a hollow conductor, Ytheirsaiidhoses lying in said hollow conductor; and means elec trically connecting said hollow conductor to the portions of the X ray tube-tclbe-coqledisaid means defining an electric shieldiffor'the* cooling* 2. In an X-ray installation, an )kf-rays,tubeA4 c havingqa Imember to begcooledpbyl aliquidi-medium, isa-id member.- having -a metal tubularextension adapted to receive :the cooling liquid,L a` liexible hose'connected to saidextension serving to supply the cooling Y liquid-1 thereto, a high-4 tension electric cable `for .supplyingcurrent to the-ray tubefandihaving 'a :hollow l conductor,l

means connecting said cable .to` said 'tubecomprisingla hollow insulating body forming an end portion of thefcable and anotheriihollow insulating bcdygconne'ctedzto. the(y Xeray ftube, said insulating bodies having mutually engaging sur;` Iacesland 4iorming:withLthe hollowyconductor of the cable a continuouspassage in which said exible -hose@is,flocated;'the metal tubulariexf tension'of thciX-raST-tube extending in ,theyhollowy insulating portionl connected tothe tube, a metal tubular o portion extending in'fthe `hollow insulating k portion-gcarried `bythe cable; con- 40 nectedzto the hollow conductor of the cable, said tubular-'jrextensionLand metaltubular portion ending in Lua set'of. y hollowV electrical contact bushings,l one engaging thev othergand surroundingthe -endi-cf -said flexible-hose.I f

:45 3. lin- ;anelectlfic.installation, almetallic envelope. an electric ldischarge tube :mounted therein andjhaving. a; portion` 'to be put undery high potential with respect toi-the envelope and to be cooled by a liquid medium, a iiexible high-tension cable for supplying current to said portion having a hollow conductorvcoated with insulating material and a metal sleeve surrounding said insulating material, the envelope enclosing the X-rayV tube having an aperture throughwhch the end of the' cable is intro'ducedjrneans securing the metal sleeve of the' cableito the metal envelope of the tube and means electrically connnecting the hollow conductor with the portion of theatube'to be supplied with current, a flex- Aiblehose adapted to'be a conduit for the cooling liquid located in .thehollow conductor of said zfcable, and vmeans connecting said hose to the portion-.of the tube to be cooled, said last-mention'eclv means being"concentrically surrounded .l v, ,byl the f fmeans .4 for i. f'electrically connecting the 'c'onductor with the tube. it ln an X-ray installation an X-ray tube hav- 'ing' portions to be cooled by a liquid medium, a highf-tension electric cable vfor supplying current to the Xfraytube `and havinga hollow conductor forming-ia conduit in said cable for sa id cooling medium, means for connecting the =con ductor and tube; saidgmeans comprising insulatf, ing parts and hollow conductive parts, the latter: being enclosed-by said insulating parts, said holl0wc0nductive .parts, forming a passage registers ing v`with the ,said 'conduitand Vdeiining together with; saidphollow .conductor ja continuous conductivesleeve topreventelectric elds from in tercepting the liquid. 5i.- fIn an X-ray v.i1 i stalla1 sion, an Xfray `tube having portions to be cooled; by a liquid medium, a high-tension electric cable having a hollow conductoig means for connecting the cable and the tube,V said means comprising a hollow conductive portion,` the passages; formed by said hollow lconductive portionand said hollow confA ductorbeing in line with each other, a flexible hose extending through said-cable and engagl ing said conductive portion, the latter dening togetherwith the said hollow conductor-an elecaot tric shield extendingover the flexible hose and preventing velectric lines `of force from penetratinglritofthclatter, t 

